ASSESSMENT OF GENEALOGIC LINES OF SHEEP FROM SYNTHETIC POPULATION BULGARIAN MILK

E. Raicheva, T. Ivanova

Abstract: The aim of the study was to assess the genealogical lines of sheep from Synthetic population Bulgarian milk. The study included 116 ewes raised in the experimental base of IAS - Kostinbrod. The study was conducted with three lines: № 604 (with ram founder from IAS - Kostinbrod), №93 (with ram founder from Experimental Station - Vidin) and №3156 (with ram founder from AI - Shumen). The dairy milk production for 120 days milking period was evaluated by AC method of ICAR. The test day milk was calculated by multiplying the quantity of milk from morning individual control by a factor of flock representing the ratio: morning + evening milk yield / morning milk yield. The control period lasted 30 ± 3 days. Milking milk yield was calculated as the sum of the standard 120 daily milking milk yield and milk yield after the 120 days. Fecundity was defined in percentage as the ratio of number of all born lambs (included all born lambs – live born, dead born and aborted) to lambed ewes. The data were calculated by the methods of variation statistics with statistical program EXCEL 2003. The effect of line on milk production and fecundity was evaluated by one-way ANOVA. No significant effects of line on the milk yield and the fecundity of sheep was found. The obtained average values of the standard 120 daily milking milk yield - 113.06 l and 106.25 l, respectively, for the lines 604 and 3156, characterized ewes suitable for production of rams. Biological fecundity of ewes was 130%, 137% and 145%, respectively, for lines 93, 604 and 3156.

Keywords: dairy sheep; fecundity; genealogic line; milk production

Date published: 2017-03-14